'Our first half performance was embarrassing but it's great we can shout at each other to change things, ' said the Tottenham defender, who impressed as England bounced back from Saturday's 2-1 Wembley defeat to Spain.
England returned to winning ways with a narrow 1-0 victory over Switzerland in an global friendly on Tuesday. "We had a real jigsaw of minutes to piece together, when to put people on or take them off, and we've got them through the game".
"I'm really pleased for him more than anything", Southgate told Sky Sports after the 20-year-old scored his fifth worldwide goal.
After being pegged back, Switzerland struggled to reimburse the first half dominance that almost saw them surge ahead.
It was Rashford's fifth goal for England in 27 matches.
"The players certainly had a lot to say to each other when they first got into the dressing room".
"It was a tall order to ask them to play against an excellent Switzerland side, they kept the ball well and we had to chase too much". Clearly ill at ease with the ball at his feet, the Stoke man nearly passed the ball into his own net in the sixth minute and his under-hit pass to James Tarkowski seconds later culminated in Xherdan Shaqiri hitting the post for the visitors. In the end, we are over the moon to keep a clean sheet and get back to winning ways'.
'The gaffer had stern words with us and second half was much better'. We always encourage them to have a voice.
"We were trying to correct one or two things but also challenge them a bit, it was an important night for us to finish well and we knew it would be hard because of the changes and amount of game time, but I'm really pleased because the players have given everything this week. Today they were harsh on themselves".
"We talked a bit after the World Cup about the demands of the modern player".
There was also a standout result in England's Nations League group on Tuesday night as Spain thumped Croatia 6-0 in Alicante.
"We were very keen that he had the opportunity, we were determined to give him some match minutes", said Southgate.